/* global tinymce, tinyMCEPreInit, QTags, setUserSetting */

window.switchEditors = {

	switchto: function( el ) {
		var aid = el.id,
			l = aid.length,
			id = aid.substr( 0, l - 5 ),
			mode = aid.substr( l - 4 );

		this.go( id, mode );
	},

	// mode can be 'html', 'tmce', or 'toggle'; 'html' is used for the 'Text' editor tab.
	go: function( id, mode ) {
		var t = this, ed, wrap_id, txtarea_el, iframe, editorHeight, toolbarHeight,
			DOM = tinymce.DOM; //DOMUtils outside the editor iframe

		id = id || 'content';
		mode = mode || 'toggle';

		ed = tinymce.get( id );
		wrap_id = 'wp-' + id + '-wrap';
		txtarea_el = DOM.get( id );

		if ( 'toggle' === mode ) {
			if ( ed && ! ed.isHidden() ) {
				mode = 'html';
			} else {
				mode = 'tmce';
			}
		}

		function getToolbarHeight() {
			var node = DOM.select( '.mce-toolbar-grp', ed.getContainer() )[0],
				height = node && node.clientHeight;

			if ( height && height > 10 && height < 200 ) {
				return parseInt( height, 10 );
			}

			return 30;
		}

		if ( 'tmce' === mode || 'tinymce' === mode ) {
			if ( ed && ! ed.isHidden() ) {
				return false;
			}

			if ( typeof( QTags ) !== 'undefined' ) {
				QTags.closeAllTags( id );
			}

			editorHeight = txtarea_el ? parseInt( txtarea_el.style.height, 10 ) : 0;

			if ( tinyMCEPreInit.mceInit[ id ] && tinyMCEPreInit.mceInit[ id ].wpautop ) {
				txtarea_el.value = t.wpautop( txtarea_el.value );
			}

			if ( ed ) {
				ed.show();

				// No point resizing the iframe in iOS
				if ( ! tinymce.Env.iOS && editorHeight ) {
					toolbarHeight = getToolbarHeight();
					editorHeight = editorHeight - toolbarHeight + 14;

					// height cannot be under 50 or over 5000
					if ( editorHeight > 50 && editorHeight < 5000 ) {
						ed.theme.resizeTo( null, editorHeight );
					}
				}
			} else {
				tinymce.init( tinyMCEPreInit.mceInit[id] );
			}

			DOM.removeClass( wrap_id, 'html-active' );
			DOM.addClass( wrap_id, 'tmce-active' );
			DOM.setAttrib( txtarea_el, 'aria-hidden', true );
			setUserSetting( 'editor', 'tinymce' );

		} else if ( 'html' === mode ) {

			if ( ed && ed.isHidden() ) {
				return false;
			}

			if ( ed ) {
				if ( ! tinymce.Env.iOS ) {
					iframe = DOM.get( id + '_ifr' );
					editorHeight = iframe ? parseInt( iframe.style.height, 10 ) : 0;

					if ( editorHeight ) {
						toolbarHeight = getToolbarHeight();
						editorHeight = editorHeight + toolbarHeight - 14;

						// height cannot be under 50 or over 5000
						if ( editorHeight > 50 && editorHeight < 5000 ) {
							txtarea_el.style.height = editorHeight + 'px';
						}
					}
				}

				ed.hide();
			} else {
				// The TinyMCE instance doesn't exist, run the content through 'pre_wpautop()' and show the textarea
				if ( tinyMCEPreInit.mceInit[ id ] && tinyMCEPreInit.mceInit[ id ].wpautop ) {
					txtarea_el.value = t.pre_wpautop( txtarea_el.value );
				}

				DOM.setStyles( txtarea_el, {'display': '', 'visibility': ''} );
			}

			DOM.removeClass( wrap_id, 'tmce-active' );
			DOM.addClass( wrap_id, 'html-active' );
			DOM.setAttrib( txtarea_el, 'aria-hidden', false );
			setUserSetting( 'editor', 'html' );
		}
		return false;
	},

	_wp_Nop: function( content ) {
		var blocklist1, blocklist2,
			preserve_linebreaks = false,
			preserve_br = false;

		// Protect pre|script tags
		if ( content.indexOf( '<pre' ) !== -1 || content.indexOf( '<script' ) !== -1 ) {
			preserve_linebreaks = true;
			content = content.replace( /<(pre|script)[^>]*>[\s\S]+?<\/\1>/g, function( a ) {
				a = a.replace( /<br ?\/?>(\r\n|\n)?/g, '<wp-line-break>' );
				a = a.replace( /<\/?p( [^>]*)?>(\r\n|\n)?/g, '<wp-line-break>' );
				return a.replace( /\r?\n/g, '<wp-line-break>' );
			});
		}

		// keep <br> tags inside captions and remove line breaks
		if ( content.indexOf( '[caption' ) !== -1 ) {
			preserve_br = true;
			content = content.replace( /\[caption[\s\S]+?\[\/caption\]/g, function( a ) {
				return a.replace( /<br([^>]*)>/g, '<wp-temp-br$1>' ).replace( /[\r\n\t]+/, '' );
			});
		}

		// Pretty it up for the source editor
		blocklist1 = 'blockquote|ul|ol|li|table|thead|tbody|tfoot|tr|th|td|div|h[1-6]|p|fieldset';
		content = content.replace( new RegExp( '\\s*</(' + blocklist1 + ')>\\s*', 'g' ), '</$1>\n' );
		content = content.replace( new RegExp( '\\s*<((?:' + blocklist1 + ')(?: [^>]*)?)>', 'g' ), '\n<$1>' );

		// Mark </p> if it has any attributes.
		content = content.replace( /(<p [^>]+>.*?)<\/p>/g, '$1</p#>' );

		// Separate <div> containing <p>
		content = content.replace( /<div( [^>]*)?>\s*<p>/gi, '<div$1>\n\n' );

		// Remove <p> and <br />
		content = content.replace( /\s*<p>/gi, '' );
		content = content.replace( /\s*<\/p>\s*/gi, '\n\n' );
		content = content.replace( /\n[\s\u00a0]+\n/g, '\n\n' );
		content = content.replace( /\s*<br ?\/?>\s*/gi, '\n' );

		// Fix some block element newline issues
		content = content.replace( /\s*<div/g, '\n<div' );
		content = content.replace( /<\/div>\s*/g, '</div>\n' );
		content = content.replace( /\s*\[caption([^\[]+)\[\/caption\]\s*/gi, '\n\n[caption$1[/caption]\n\n' );
		content = content.replace( /caption\]\n\n+\[caption/g, 'caption]\n\n[caption' );

		blocklist2 = 'blockquote|ul|ol|li|table|thead|tbody|tfoot|tr|th|td|h[1-6]|pre|fieldset';
		content = content.replace( new RegExp('\\s*<((?:' + blocklist2 + ')(?: [^>]*)?)\\s*>', 'g' ), '\n<$1>' );
		content = content.replace( new RegExp('\\s*</(' + blocklist2 + ')>\\s*', 'g' ), '</$1>\n' );
		content = content.replace( /<li([^>]*)>/g, '\t<li$1>' );

		if ( content.indexOf( '<option' ) !== -1 ) {
			content = content.replace( /\s*<option/g, '\n<option' );
			content = content.replace( /\s*<\/select>/g, '\n</select>' );
		}

		if ( content.indexOf( '<hr' ) !== -1 ) {
			content = content.replace( /\s*<hr( [^>]*)?>\s*/g, '\n\n<hr$1>\n\n' );
		}

		if ( content.indexOf( '<object' ) !== -1 ) {
			content = content.replace( /<object[\s\S]+?<\/object>/g, function( a ) {
				return a.replace( /[\r\n]+/g, '' );
			});
		}

		// Unmark special paragraph closing tags
		content = content.replace( /<\/p#>/g, '</p>\n' );
		content = content.replace( /\s*(<p [^>]+>[\s\S]*?<\/p>)/g, '\n$1' );

		// Trim whitespace
		content = content.replace( /^\s+/, '' );
		content = content.replace( /[\s\u00a0]+$/, '' );

		// put back the line breaks in pre|script
		if ( preserve_linebreaks ) {
			content = content.replace( /<wp-line-break>/g, '\n' );
		}

		// and the <br> tags in captions
		if ( preserve_br ) {
			content = content.replace( /<wp-temp-br([^>]*)>/g, '<br$1>' );
		}

		return content;
	},

	_wp_Autop: function(pee) {
		var preserve_linebreaks = false,
			preserve_br = false,
			blocklist = 'table|thead|tfoot|caption|col|colgroup|tbody|tr|td|th|div|dl|dd|dt|ul|ol|li|pre' +
				'|form|map|area|blockquote|address|math|style|p|h[1-6]|hr|fieldset|legend|section' +
				'|article|aside|hgroup|header|footer|nav|figure|details|menu|summary';

		if ( pee.indexOf( '<object' ) !== -1 ) {
			pee = pee.replace( /<object[\s\S]+?<\/object>/g, function( a ) {
				return a.replace( /[\r\n]+/g, '' );
			});
		}

		pee = pee.replace( /<[^<>]+>/g, function( a ){
			return a.replace( /[\r\n]+/g, ' ' );
		});

		// Protect pre|script tags
		if ( pee.indexOf( '<pre' ) !== -1 || pee.indexOf( '<script' ) !== -1 ) {
			preserve_linebreaks = true;
			pee = pee.replace( /<(pre|script)[^>]*>[\s\S]+?<\/\1>/g, function( a ) {
				return a.replace( /(\r\n|\n)/g, '<wp-line-break>' );
			});
		}

		// keep <br> tags inside captions and convert line breaks
		if ( pee.indexOf( '[caption' ) !== -1 ) {
			preserve_br = true;
			pee = pee.replace( /\[caption[\s\S]+?\[\/caption\]/g, function( a ) {
				// keep existing <br>
				a = a.replace( /<br([^>]*)>/g, '<wp-temp-br$1>' );
				// no line breaks inside HTML tags
				a = a.replace( /<[a-zA-Z0-9]+( [^<>]+)?>/g, function( b ) {
					return b.replace( /[\r\n\t]+/, ' ' );
				});
				// convert remaining line breaks to <br>
				return a.replace( /\s*\n\s*/g, '<wp-temp-br />' );
			});
		}

		pee = pee + '\n\n';
		pee = pee.replace( /<br \/>\s*<br \/>/gi, '\n\n' );
		pee = pee.replace( new RegExp( '(<(?:' + blocklist + ')(?: [^>]*)?>)', 'gi' ), '\n$1' );
		pee = pee.replace( new RegExp( '(</(?:' + blocklist + ')>)', 'gi' ), '$1\n\n' );
		pee = pee.replace( /<hr( [^>]*)?>/gi, '<hr$1>\n\n' ); // hr is self closing block element
		pee = pee.replace( /\s*<option/gi, '<option' ); // No <p> or <br> around <option>
		pee = pee.replace( /<\/option>\s*/gi, '</option>' );
		pee = pee.replace( /\r\n|\r/g, '\n' );
		pee = pee.replace( /\n\s*\n+/g, '\n\n' );
		pee = pee.replace( /([\s\S]+?)\n\n/g, '<p>$1</p>\n' );
		pee = pee.replace( /<p>\s*?<\/p>/gi, '');
		pee = pee.replace( new RegExp( '<p>\\s*(</?(?:' + blocklist + ')(?: [^>]*)?>)\\s*</p>', 'gi' ), '$1' );
		pee = pee.replace( /<p>(<li.+?)<\/p>/gi, '$1');
		pee = pee.replace( /<p>\s*<blockquote([^>]*)>/gi, '<blockquote$1><p>');
		pee = pee.replace( /<\/blockquote>\s*<\/p>/gi, '</p></blockquote>');
		pee = pee.replace( new RegExp( '<p>\\s*(</?(?:' + blocklist + ')(?: [^>]*)?>)', 'gi' ), '$1' );
		pee = pee.replace( new RegExp( '(</?(?:' + blocklist + ')(?: [^>]*)?>)\\s*</p>', 'gi' ), '$1' );
		pee = pee.replace( /\s*\n/gi, '<br />\n');
		pee = pee.replace( new RegExp( '(</?(?:' + blocklist + ')[^>]*>)\\s*<br />', 'gi' ), '$1' );
		pee = pee.replace( /<br \/>(\s*<\/?(?:p|li|div|dl|dd|dt|th|pre|td|ul|ol)>)/gi, '$1' );
		pee = pee.replace( /(?:<p>|<br ?\/?>)*\s*\[caption([^\[]+)\[\/caption\]\s*(?:<\/p>|<br ?\/?>)*/gi, '[caption$1[/caption]' );

		pee = pee.replace( /(<(?:div|th|td|form|fieldset|dd)[^>]*>)(.*?)<\/p>/g, function( a, b, c ) {
			if ( c.match( /<p( [^>]*)?>/ ) ) {
				return a;
			}

			return b + '<p>' + c + '</p>';
		});

		// put back the line breaks in pre|script
		if ( preserve_linebreaks ) {
			pee = pee.replace( /<wp-line-break>/g, '\n' );
		}

		if ( preserve_br ) {
			pee = pee.replace( /<wp-temp-br([^>]*)>/g, '<br$1>' );
		}

		return pee;
	},

	pre_wpautop: function( content ) {
		var t = this, o = { o: t, data: content, unfiltered: content },
			q = typeof( jQuery ) !== 'undefined';

		if ( q ) {
			jQuery( 'body' ).trigger( 'beforePreWpautop', [ o ] );
		}

		o.data = t._wp_Nop( o.data );

		if ( q ) {
			jQuery('body').trigger('afterPreWpautop', [ o ] );
		}

		return o.data;
	},

	wpautop: function( pee ) {
		var t = this, o = { o: t, data: pee, unfiltered: pee },
			q = typeof( jQuery ) !== 'undefined';

		if ( q ) {
			jQuery( 'body' ).trigger('beforeWpautop', [ o ] );
		}

		o.data = t._wp_Autop( o.data );

		if ( q ) {
			jQuery( 'body' ).trigger('afterWpautop', [ o ] );
		}

		return o.data;
	}
};
